html, body {
	margin: 0;
	padding: 0;
}
header {
	-webkit-app-region: drag;
	-webkit-user-select: none;
	height: 20px;
	position: fixed;
	top: 0;
	right: 0;
	background-color: gray;
	left: 0;
	text-align: center;
	padding: 5px;
}
main {
	width: 100%;
	height: 100%;
	display: block;
	margin-top: 30px;
}
main p {
	padding: 5px;
}
.window-button {
	-webkit-app-region: no-drag;
	position: fixed;
	top: 0;
	display: block;
	height: 30px;
	width: 30px;
	text-align: center;
	font-size: 26px;
	font-weight: bold;
	cursor: pointer;
	opacity: 0.7;
	z-index: 1;
}
.window-button:hover {
	opacity: 1;
}
#exit-button {
	right: 0;
	background-color: red;
	color: white;
}
#minimize-button {
	right: 30px;
	background-color: blue;
	color: white;
}